This seems fun in Commander. Every lizard essentially comes in with 3 +1/+1 counters on them, as long as everyone’s alive and doesn’t prevent damage.
I might be reading it wrong but I think the first one enters with one +1/+1 counter b/c Gev’s ability targets an opponent (not each opponent). The second one would be 2 counters assuming you hit a different opponent, etc.
This can be true, but you need to ping your opponents before you get your lizard. Something like this will give you maximum counters: https://gatherer.wizards.com/pages/card/details.aspx?multiverseid=426927